<!DOCTYPE html>
<html>
<style>
  .box {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
  }

  .item {
    width: 30%;
    padding-top: 30%;
    margin-top: 3%;
    border-radius: 10%;
    background-color: orange;
  }
</style>

<body>
  <div class="box">
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
  </div>
</body>

</html>